Traction-wheel.



W. A. MYUKINNEY.

TRACTION WHEEL.

APPLIOATION FILED we. 15, 1910.

Patented Jame, 191.1,.

WiELLIAM AdMcKINNEY, OF GAINESVILLE, GEORGIA.

TRACTION -WHEEL.

- Specification of Letters Patent. Patented Jan. 10, 1911.

application filed August 15, 1910. Serial No. 577,156.

ToaZZwlmntmycomcw-n."

.'Be it known that I, lViLLIAM A. MqKIN- REY, a citizen of the UnitedStates, residing at Grainesville, in the county of Hall and State ofGeorgia, have invented a new and useful Traction-Wheel, of which thefollowng is :a specification.

It is the object of the present invention to provide an improvedconstruction of traction wheel and the primary aim of the in- *veutionis to provide a wheel of this type which will'embody treads soconstructed as to compress the soil in a direction opposite .l30 'l}hedirection of travel and will therefore more effectually hold in the soilthan treads which merely dig. into the soil and push it in a rearwarddirection.

A further aim of the invention is to so,

construct and arrange the treads of the wheel that accumulatlon of soilupon or between them will be obviated.

It is a further aimof the invention to provide a traction wheel whichwill effectually hold to the ground surface whether the soil" be in softor hard condition. With the above and other objects in view, theinvent-ionresides in the construction and arrangement of elements shownin' the accompanyihgdra'wings, in which,

F1gure"1 isa .;view in side elevation of a portion of atraction wheelconstructed in accordance with the present invention. 1* ig. 2 is avertical sectional view taken through the portion of the wheel shown inFig l, taken in a direction from front to rear. Fig. 3 is a bottom planview of a portion of the wheel showing one of the treads and the tworims between which it is mounted.

I In the drawings, the wheel is illustrated asembodying, in itsstructure, two rims or two rim sections indicated by the numeral 5. Eachof these rims is preferably formed from a length of'bar metal bent intoannular form and having its ends welded or otherwise permanently securedtogether. The spokes of the wheel indicated by the numeral 6 andfofv anydesired form, and number, are secured to the rims 5, preferablyatcorrespoi'ldin (Y oints. The treads ofthe wheel are held etween the tworims 5 in an annular series as will now be explained.

Each tread of the wheel is in the nature of a plate of stout sheet metalthe body portion of which is indicated by the numeral 7 and at its endsthis plate is formed with a flange 8 which is bent down to extend atcontact with the ground to extend between the rims and they are sosecured in place that they will come into on an angle of about 25.

--Those corners of the flanges -8- which are presented in the directionof travel of the wheel, are bent laterally 'to' extend beneath the outerperipheries of the corresponding rims 5 as indicated by the numeral 10and this bending of the corners serves'to taper them to a greater orless degree as is clearly s own in Fig. 1 of the drawings. It willfurther be observed that the forward edge portion of the body? of v eachtread is bent downwardly at an acute angle to the said body portion asindicated bythe numeral 11 and thisdown bent portion or flange 11afi'ords, in conjunction with the toe of the tread. In other words, whenthe wheel is traveling over the surface of the ground, theifianges 11and laterally bent corners 10 of each tread willfirst (11 into the soiland the body of the tread will bear I is traveling over soft'ground.Thus, it will be seen'that the wheel is adapted for travel over groundof almost any character and that the soil is compressed and in adirection'substantially opposite'to the direction of travel as well asdownwardly and is not raked up and merely thrown rearwardly as isthe-case in certain forms of such wheels now in'general use.

It will be observed from an inspection of Fig. 2 of the drawings thatthe rear edge of the body of each tread is in substantially radialalinement with or located radially inwardly of the forward edge orflange 11 of the body of the tread next to the rear. It, will also beobserved that while-the treadsare so arranged, they' are spaced so thatsoil will not ack between them but .will be .readilyd1scharged asthe'wheel rotates.

the laterally bent corners of the flanges 8,

cries of the rims 5, inward pressure ez-rerted;- v

J m th flanges-being bent'around the outer periphagainst the bodies ofthe treads will be better resisted than should the said corners extend'radially. In other words, the engagement of the corners of theflanges about the outer peripheries of the rims serves to aid the rivets9 in holding the treadsin place between the rims.

WVhat is'claimed is:

1. In a traction wheel, spaced rims, treads s11 ported between the rimsand fcom rising a odyhaving lateral flanges secure to the lower forwardcorners of the eries of the corresponding rims.

I 2. In. a traction wheel, spaced rims, treads body being formed at itsforward edge with an outwardly, presented flange.

"3.1111 a traction-wheel, spaced rims, treads supported between the rimsand comprising a body having lateral flanges secured to the rims, thelower flanges :being bent around-the outer peripheries of thecorresponding rims, the said body being formed at its -forward edge withan outwardly presented fiange'extendmg between the said corners of thetwo lateral flanges of the body.

. In testimony that I claim the foregoing as my own, I have heretoafiixed my signature in the presence of two witnesses;

WILLIAM A. MCKINNEY,

Witnesses:

C. P. NEESE, R. J. SaNnEns;

forward corners of the

